0.25M Mini Copper Bevel Gears 9–20 Teeth DIY Model Gear Set

Precision 0.25 Module Mini Copper Bevel Gears for DIY Models & Mechanisms

Take your miniature builds and mechanical projects to the next level with these precision 0.25 Module mini copper bevel gears. Available in a wide range of tooth counts (9 through 20 teeth) and bore sizes (1mm, 1.5mm, 2mm, and 3mm), these compact gears are the perfect choice for hobbyists, engineers, and makers crafting intricate DIY models, clockwork mechanisms, robotics, and micro-scale assemblies.

Key Features

• Module: 0.25M – precision-machined for smooth, consistent meshing
• Tooth Options: 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 teeth
• Bore Sizes: 1mm / 1.5mm / 2mm / 3mm inner hole options
• Material: High-quality copper – durable, corrosion-resistant, and excellent for fine detail work
• Tooth Profile: Bevel gear – ideal for transmitting motion between intersecting shafts
• Manufacturing Process: Die casting for consistent dimensions and tight tolerances
• Shape: Bevel – engineered for directional power transfer in compact assemblies

Typical Specifications by Tooth Count

• 11 Teeth: Inner hole 0.98mm | Total thickness 3mm | Max outer diameter 3.25mm
• 13 Teeth: Inner hole 1.48mm | Total thickness 3.5mm | Max outer diameter 3.90mm

Dimensions vary by tooth count and bore size — please verify the specific variant listing before ordering.

Who Are These Gears For?

These miniature copper bevel gears are ideal for:

• DIY hobbyists building scale models, automata, or mechanical sculptures
• Engineers and students prototyping micro-gear systems
• Robotics builders needing compact, reliable gear sets
• Clockmakers and watchmakers working on small-scale mechanisms
• Craft and art projects requiring functional miniature moving parts

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Made in Mainland China.

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Frequently Asked Questions

Q: What does "0.25 Module" mean for these mini copper bevel gears?

A: The module (M) is a standard measurement describing the size of gear teeth — specifically the ratio of the pitch diameter to the number of teeth. A 0.25M gear has very fine, small teeth, making these gears ideal for miniature mechanisms where space is at a premium, such as DIY models, micro-robots, and small clockwork assemblies.

Q: Are these bevel gears compatible with each other across different tooth counts?

A: Yes — as long as they share the same module (0.25M), bevel gears with different tooth counts can mesh together to change rotation speed or direction. Be sure to match the bore size to your shaft diameter for a secure fit.

Q: What bore size should I choose for my project?

A: Choose the bore size (1mm, 1.5mm, 2mm, or 3mm) that matches your axle or shaft diameter. If you are unsure, measure your shaft with calipers before ordering to ensure a precise fit and avoid slippage in your mechanism.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.